@SlyFlourishDo dragon and Tarrasque claws count as magical weapons or does it have to be clearly identified like Tiamat’s stat block? A monster's stat block tells you if its weapon attacks are magical, as in the golems and angels in the MM.
— Jeremy Crawford (@JeremyECrawford) November 15, 2014
Is the aspect of tiamat/bahamut from fizbans lack of magical weapon attack an error? @JeremyECrawford